The average fuel economy of new vehicles sold in the US in December 2011 was 22.2 MPG—a 2.2% drop of 0.5 mpg from November 2011, according to the monthly assessment by the University of Michigan Transportation Research Institute (UMTRI).
The UMTRI Eco-Driving Index (EDI)—an index that estimates the average monthly emissions generated by an individual US driver—stood at 0.85 in October 2011 (a decrease of 15% from October 2007). The EDI takes into account both vehicle fuel economy and distance driven (the latter relying on data that are published with a two-month lag).
|Average sales-weighted mpg. Source: UMTRI. Click to enlarge.|